Electric generator.



G. H ONOLD. ELECTRIC GENERATOR.

APPLICATION FILED JUNE 16, 1905.

900,542, I Patented 00. 6,1908.

NITNE'S'SE'S q INVENTDR mm NEYg,

UNITED STATES PATENT OFFICE.

' mma nononaon STUTTGART, GERMANY.

nmcmidqrzmnron Sppciflcation oLLetteraPa-tent,

wanted Oct. 6, 19,08.

Original applicationtfila'd April, 80, 1902; No: 106,680. Divided andnthia application flled Jn'ne 16; 1905:

SeriahNo.

Germany, have invented certain new and useful Improvements in Electric Generators,

(being a division of my application Serial No.- 105,380, filedApril 30, 1902; andfI do hereby declare the following to'be a: full;

clear, and exact: description ofthe invention,

.such as-will enable others skilled in the art to which it appertains to make and'use the same.

Myx invention relates to improvements inelectric generators, and in particular to'a magneto-electric generator suitable for use with ignition devices for internal combustionengines.

The object of myinvention is to obtain a a simple andidurable apparatus, and at the same time toprovide means whereby this voltage is sustained for an appreciable pe riod of'time."

' tion Ofi a enerator-embodying my invention in its pre erred form, and" Figs. 3 and-4 end views of the same.

Referring to Fig, 1 offthe drawings, ai-isa. revoluble'armature provided with aplural ity of armature turns forming awinding'b Whose-terminals are connected in any suitable way to the electrodes e, f, of the ignition device, as,'for example, by means of the con ductors c andd: Inadditionto this, a shuntcircuit is providedfor the armature, as, for example, by connecting one terminalof-"the circuitformed-bythe conductors g and h",

Whichclosingmeans is operated intermit tently toopen and close the. shuntcircuit. Inithe present example, this means COIlSlStS? of aspring contact-arm Z arranged to onhigh voltage at the ignition electrodes, with With this object in viewmy inventiorncom winding-to a-conductor g,w hile-another conductor h, is united to the armature-winding:

gage a contact-post m, whereby-the shunt cir- 'cuit is closed, the contact-arm being pressed away from-' contact with the post by any suitable means, for example, by a cam is retated in any desired manner. In my preferred construction, a condenser z" is connected-* in parallel with the contact-arm and post;

In the specific embodiment of the invention shown in Figs. 2, 3 and' l, a is an armature revolubly mounted between two end plates n and 0 which are attached to field mag. lets 1 in any desired way, as for example, by screws p and-q (see Figs. 2 and3).

The armature a is provided" at one end with atrunniona which is revolubly mountcdiin a bearing 0 'carried'by the endplate 0,

the trunnion a projecting beyond the said 'bearin 0 and being squared toreceive a ear-w eeliK having an inwardprojecting ange 70, Fig; 2,.whichis cam-shaped'to serve as a cam for actuating the circuit interrupter, as will be further explainedhereinafter. The other end of the armature a is supported-upona trunnion t'which is hollow 'andrevolubly. mounted. in a bearing n car,- riedby the endplate n. Throu h this hollow trunnion 25 there extends a s eeve u and within this sleeve is an. axle s', which. projects beyond the sleeve u as willi be clear from Fig; 2; The sleeve u is insulated from the hollow trunnion t andfrom the axle s by suitable insulating material as indicated by the black lines in Fig. 2, and as will be fully understood'by those skilled in the art. The axle s, the sleeve u and the hollow trunnion t rotate together with the armature.

The armaturea has a suitable winding, consisting of a plurality ofiturns, one end-of. said winding being electrically connected-to the'axle' s, as shown in Fig. 2, while the other end. isgrounded on the armature core,, as indicated at' b, Fig.- 2: Furthermore, the armature windingis also tapped at a suitable-point and connected-with the sleeve u, as for example, by thewire h, Fig; 2;

(Dne electrode 0 of the/ignition device is in electrical connection withthe axle 8 through a-conductor c attaehed to abrnsh'v, Figr3'; whiehibears on the-said axles and .thus maintains sin-electrical connection be-' armature t'o-rotate. The otherelectrode f is in electrical communication with the base of the machine through a conductor d suitably attached to the base as by means of one of the screws 9, Fig. 2. In this way an elec-- trical communication is made between the grounded terminal b of the armature wind ing 1) and the electrode f, by way of the armature itself, the trunnion a, thebearing. 0', end plate 0 and the machine base.

At the top of the machine is mounted a condenser '21, whose terminals are indicated at 2", and 71 Fig. 2.

Upon the cam device In rests one end of a yielding contacts ring l whose other end is fixed to the end p ate 0 of the machine and is in electrical communication therewith. The contact sprin Z is arranged to make and break contact wit a contact post-w carried by but insulated from the end plate 0. This part a: is in electrical communication with ,the sleeve it through a conductor I and a brush w (Fig. 3) which bears against the under side of the said sleeve '24.

The conductor h is also connected to one terminal 71 of the condenser i as shown in Fig. 2, the other terminal 2" of the condenser being rounded on the machine base, as for examp e, by means of a conductor'g, leading from the terminal 2" to one of the screws 39 of the end plate 12.. i

The gear wheel K is driven in any suitable manner, as for example, by a gear wheel on the engine, (not shown). When the gear wheel rotates, the armature is rotated and the cam causes the contactspring Z to rise and fall thus making and breaking contact with the post :20.

When the contact is made between the post on and spring Z a shuntcircuit is closed from the grounded terminal 6 of the armature winding, through some of the turns of such windin to conductor h thence over the sleeve u, rush w and conductor k to post it and sprin Z, which beinggrounded on the machine itse f isin electrical connection with the grounded terminal b of the armature winding.

When the armature is set in rotation, electromotive forces are induced in the winding by the magnetic field. If now some of the turns are shunt circuited, by the contact of the contact-arm Z, with, the post an, the current flowing in the shunt circuited winding generates ines of magnetic force in the armature which neutralize the existin magnetic field, that is to say, they force bacfi the existing lines of force.

Assoon as the shunt circuit is opened or broken, the counter-action of the lines of force generated in the armature' ceases. Owing to the changes thiis arising instantaneously in the number of lines of magnetic.

force, the potential rises so hi h in the armature windlng that a small vo taic are forms between the electrodes, e, f, of the ignition devlce, and, moreover, this arc is sustained eoaeaa electrodes arranged to be energized from the generator-turns, means for shunt circuiting a portion of said generator-turns, and means for opening said shunt-circuit, {whereby a spark is produced between the electrodes.

2. The combination, with a generator having a plurality of generating turns, of spark electrodes arranged to be energized from the generator-turns, a shunt circuit arranged to shunt circuita portion of said enerator turns, a condenser included in said shuntcircuit, and means for opening said shunt circuit.

3. The combination, with a generator hava ing a plurality of armature-turns, of spark electrodes out of contact with each other, a circuit including said electrodes and arranged to be energized by the armature turns of the generator, a shunt-circuit in which some of said armature turns are included, and means for opening said shunt-circuit.

4. The combination, with a generator having a plurality of armature-turns, of sparkelectrodes out of contact with each other, a

. circuit includin said electrodes and arran to be energized y the armature-turns of the generator, a shunt-circuit in which some of said armature-turns are included, a condenser in saidshunt-circuit, and means for opening said shunt-circuit.

. 5. The combination, with a generator having a plurality of armature-turns, of sparkelectrodes out of contact with each other, a circuit includin said electrodes andarranged to be energized %y the armatureturns of the generator, a shunt-circuit in which some of said armature-turns are included, and means for opening and closing said shunt-circuit.

6. The combination, with a generator having armature-turns, of spark electrodes arranged to be energized by said armatureturns, a shunt-circuit connected to two different points of the armature-turns, and

means for intermittently opening and closing said shunt-circuit.

7. The combination, with a generator having armature-turns, of spark-electrodes arranged to be energized by said turns, a shuntcircuit connected to two different points of the 'armature-turns,an interrupter included in theflshunt-circuit, and a condenser connected to the shunt-circuit in pa'rallel'with the interrupter. i

8. The combination, with a, generator having armature-turns, of spark-electrodes ar-' ranged to be energized by said turns, a shuntturns, and spark-electrodesincluded in the igniting circuit, of a shunt-circuit including a part only of said armature turns, and means for closing and opening the said shuntcircuit. i

10 The combination, with a generator having a plurality of armature-turns, an igniting circuitconnected to the ends of said turns, and spark-electrodes included in the igniting circuit, of a shunt-circuit connected to one end of said turns and toan lntermeydiate point of the same, and means for closing and opening said shunt-circuit. I

In testimony whereof I hereunto aflix my signature in the presence of two witnesses.

GOTTLOB I HONOLD.

Witnesses ROBERT Boson,

ERNST ENTENMAN. 

